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Achi Rinaldi

Universitas Islam Negeri Raden Intan Lampung

Author-ID : 2539361

Religion Aerospace Engineering Arts Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Physics Social Sciences Transportation Other

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Aplikasi Model Persamaan Struktural pada Program R (Studi Kasus Data Pengukuran Kecerdasan) Rinaldi, Achi
Al-Jabar: Jurnal Pendidikan Matematika Vol 6 No 1 (2015): Al-Jabar: Jurnal Pendidikan Matematika
Publisher : Universitas Islam Raden Intan Lampung, INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ajpm.v6i1.56

Structural Equation Model (SEM) was known as powerfull and popular multivariate analysis technique. It provides a comprehensive method for the quantification and testing of theories. The ability of this model is to test model with multiple dependent that more powerfull than multiple regression, it’s also can make some simultaneously model in one form. Data was used from Holzinger and Swineford that measured intellegence in several indicator. This model was lack of form and performance that can be showed in value of Chi-square. Akaike Information Criterion (AIC) and Chi-square value for specificly in block “male” was less than “female”, so the result gave structural model for block male was better than female.

Sebaran Generalized Extreme Value (GEV) Dan Generalized Pareto (GP) untuk Pendugaan Curah Hujan Ekstrim di Wilayah DKI Jakarta Rinaldi, Achi
Al-Jabar: Jurnal Pendidikan Matematika Vol 7 No 1 (2016): Al-Jabar: Jurnal Pendidikan Matematika
Publisher : Universitas Islam Raden Intan Lampung, INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ajpm.v7i1.137

Extreme event such as extreme rainfall have been analyzed and most concern for the country all around the world. There are two common distribution for extreme value which are Generalized Extreme Value distribution and Generalized Pareto distribution. These two distribution have shown good performace to estimate the parameter of extreme value. This research was aim to estimate parameter of extreme value using GEV distribution and GP distribution, and also to characterized effect of extreme event such as flood. The rainfall data was taken from BMKG for 5 location in DKI Jakarta. Both of distribution shown a good perfromance. The resut showed that Tanjung Priok station has biggest location parameter for GEV and also the biggest scale parameter for GP, that mean the biggest probability to take flood effect of the extreme rainfall.

Understanding of Mathematical Concepts in the Linear Equation with Two Variables: Impact of E-Learning and Blended Learning Using Google Classroom Huda, Syamsul; Firmansyah, Mu'min; Rinaldi, Achi; Suherman, Suherman; Sugiharta, Iip; Astuti, Dian Widi; Fatimah, Okis; Prasetiyo, Andika Eko
Al-Jabar: Jurnal Pendidikan Matematika Vol 10 No 2 (2019): Al-Jabar: Jurnal Pendidikan Matematika
Publisher : Universitas Islam Raden Intan Lampung, INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ajpm.v10i2.5303

Students need an understanding of mathematical concepts provided by educators who have good skills. Educators must also maximize their teaching time so that it requires learning models such as e-learning and blended learning to meet the loss of teaching time due to other activities that must be done by the teacher besides teaching. This study aims to see the impact of blended learning and e-learning on the ability to understand mathematical concepts of students in the material of two-variable linear equations. The method used in this study is the quasi-experiment with the posttest only control design research. Technical analysis uses one way ANOVA. Based on the results of the study, Blended Learning and E-Learning influence understanding mathematical concepts in the two-variable linear equation material, so that it can be used as a knowledge given to students in understanding mathematical concepts.

Mathematical problem-solving abilities and reflective thinking abilities: The impact of the influence of eliciting activities models Hartati, Suci; Bilqis, Ratu Ayu; Rinaldi, Achi
Al-Jabar: Jurnal Pendidikan Matematika Vol 11 No 1 (2020): Al-Jabar: Jurnal Pendidikan Matematika
Publisher : Universitas Islam Raden Intan Lampung, INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ajpm.v11i1.6709

This study aims to determine the effect of the Model Eliciting Activities (MEAs) learning model to the mathematical problem-solving abilities and the mathematical reflective thinking skills. This research is a type of Quasi Experimental Design research. Data collection techniques in this study in the form of documentation and tests at the public school in Bandar Lampung with 30 students of experiment classes and 30 students of control classes. Data analysis techniques used are the normality and homogeneity test. Testing hypothesis in this study using the Multivariate Analysis of Variance (MANOVA) test. Based on the result of this study, the calculation of the MANOVA test, it was concluded that there was an influence of the Model Eliciting Activities (MEAs) to the mathematical problem-solving abilities and the mathematical reflective thinking skills. The application of the Model Eliciting Activities to the mathematical problem-solving abilities and the mathematical reflective thinking skills has a relatively high level of effectiveness.

Spatial Modeling for Poverty: The Comparison of Spatial Error Model and Geographic Weighted Regression Rinaldi, Achi; Susianto, Yuni; Santoso, Budi; Kusumaningtyas, Wahyu
Al-Jabar: Jurnal Pendidikan Matematika Vol 12 No 1 (2021): Al-Jabar: Jurnal Pendidikan Matematika
Publisher : Universitas Islam Raden Intan Lampung, INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ajpm.v12i1.8671

This study aims to analyze poverty using spatial models. The researchers also compared the Spatial Error Model (SEM) and Geographically Weighted Regression (GWR). The comparison of the two models was based on the estimation evaluation criteria and the constructed spatial associations. Spatial regression is considered very appropriate to be used to model the relationship pattern between poverty and explanatory variables when the observed data has a spatial effect caused by the proximity between the observation areas. The spatial dependence of errors on observational data can be overcome using SEM, while the effect of heterogeneity of spatial variance can overcome using GWR.

Pengaruh Pembelajaran Berbatuan Geogebra terhadap Pemahaman Konsep Matematis ditinjau dari Gaya Kognitif Purwanti, Ramadhani Dewi; Pratiwi, Dona Dinda; Rinaldi, Achi
Al-Jabar: Jurnal Pendidikan Matematika Vol 7 No 1 (2016): Al-Jabar: Jurnal Pendidikan Matematika
Publisher : Universitas Islam Raden Intan Lampung, INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ajpm.v7i1.9699

The purpose of this research is to know whether there is influence of learning model of Geogebra-assisted Discovery Learning to understanding mathematical concept, to know whether there is influence between learners who have cognitive style of FI and FD to understanding mathematical concept, to know whether there is interaction between learning of Discovery Learning Unity Geogebra with the cognitive style of learners towards the understanding of mathematical concepts. This research type is quasi experiment research, population in this research is all students of class VII of SMP Negeri 2 Bandar Lampung, sampling technique in this research use class random technique where class VII-8 as experiment class 1 with study of Discovery Learning assisted geogebra, Class VII-7 as a control class with Discovery Learning learning with Microsoft Power Point. Technique of data analysis in this research use two way Anova test with unequal cell. Based on the test results, the first hypothesis is indicated by the statistical price of 8,871, so that H0A is rejected with the conclusion that there is influence of Discovery Learning learning by geogebra toward the understanding of mathematical concept. For the second second hypothesis is shown with a statistical price of 5.23 , so H0B is rejected with the conclusion that there is an influence between learners who have cognitive style of FI and FD on the understanding of mathematical concepts. For the third hypothesis, it is shown by the statistical price of 1.05, so H0AB is accepted with no conclusion there is no interaction between the learning of Geogebra-assisted Discovery Learning with the cognitive style of learners towards the understanding of mathematical concepts.

Analysis of E-SPT and E-filing utilization on taxpayer compliance: A multiple regression approach Rinaldi, Achi; Devi, Yulistia; Salih, Dana Taha Mohammed
Al-Jabar: Jurnal Pendidikan Matematika Vol 15 No 1 (2024): Al-Jabar: Jurnal Pendidikan Matematika
Publisher : Universitas Islam Raden Intan Lampung, INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ajpm.v15i1.23060

Background: Statistical data from Lampung Province indicate a steady annual increase in the number of taxpayers utilizing e-SPT (electronic tax return) and e-filing, particularly from 2019 to 2022.Aim: This study aims to analyze the effect of e-SPT usage on taxpayer compliance, investigate the impact of e-filing on taxpayer compliance, assess the combined effects of e-SPT and e-filing on taxpayer compliance, and understand taxpayer compliance within the framework of Islamic Economics.Method: Taxpayers from the Bandar Lampung Tax Office (KPP) were selected as respondents. A random sampling technique was employed to gather data from 100 participants. The data were analyzed using multiple linear regression analysis with SPSS.Results: The findings reveal that the convenience, effectiveness, and satisfaction derived from using e-SPT and e-filing, along with an analysis of Annual Tax Returns, significantly influence taxpayer compliance. The use of e-SPT alone has a notable impact on compliance, as does the use of e-filing. Furthermore, the combined usage of e-SPT and e-filing has a significant collective impact on taxpayer compliance.Conclusion: The study concludes that both e-SPT and e-filing are critical in enhancing taxpayer compliance, with their combined application having a more substantial effect. These findings also offer insights into taxpayer compliance from the perspective of Islamic Economics, emphasizing the role of modern tax administration tools in promoting compliance.

Lembar Kerja Peserta Didik Berbasis Kegiatan Transaksi Kewirausahaan Materi Sistem Persamaan Linier Dua Variabel Supardi, Novitasari; Rinaldi, Achi; Rakhmawati M, Rosida
Desimal: Jurnal Matematika Vol. 1 No. 1 (2018): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v1i1.2012

This study aims to produce products in the form of LKPD SPLDV material, and Know the response of educators to LKPD on SPLDV material. The method of this research is Research and Development (R & D) based on ADDIE model Stages performed only from stage 1 to stage 5 that is from analysis, design, development, implementation, evaluation. The result of the material expert test on the content quality aspect obtained the average score of 3.67 with very good criteria, on the aspect of the accuracy of the scope obtained the average score of 3,167 with good criteria. Expert test media on LKPD size aspect got the average score 4 very interesting, skin design aspect LKPD got average score 3,66 with the good criterion, design aspect of LKPD got average score 3,4167 with good criterion. Expert tests obtained an average score of 3.22 with good criteria. In the small group trial of students in the attractiveness, test obtained an average score of 3.57 with interesting criteria, large group trials of students in the attractiveness test obtained an average score of 3.56 with interesting criteria. From some of the above data, it can be concluded that LKPD developed into good criteria and get a good response for the learners.

Pemahaman Konsep Peserta Didik dengan Menggunakan Graded Response Models (GRM) Tama, Arfani Manda; Rinaldi, Achi; Andriani, Siska
Desimal: Jurnal Matematika Vol. 1 No. 1 (2018): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v1i1.2041

The objective of the study was to analyze the students' comprehension ability concept by using Graded Response Models (GRM). This research is a type of qualitative research with descriptive approach. The subjects of the study were students of class VIII of 6 people by purposive sampling. Technique of collecting data is done by written test (essay) and interview. Data analysis technique is using Graded Response Models (GRM) test, which is then combined with data reduction, data presentation, and conclusion. The results showed that students who have high ability category of 18.19%, 60.6% moderate students, and low-ability students 21.21%. This can be seen from the scores obtained from the students' ability to comprehend the concept of mathematical concepts, and obtained the graph of parameter estimation results by using Graded Response Models can be increased from the lowest ability of learners that is θ (-4) to the highest ability of learners ie θ (4) for each item item category.

Pengembangan Modul Pembelajaran Matematika Berbasis Etnomatematika Menggunakan Metode Inkuiri Mardiah, Siti; widyastuti, Rany; Rinaldi, Achi
Desimal: Jurnal Matematika Vol. 1 No. 2 (2018): Desimal : Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v1i2.2228

This research entitled Development of Mathematics Based Module of Ethnomathematics using Inkuiri method. This study aims to find out how the development of mathematics learning module based on ethnomathematics using inquiry method, and to know the teacher and student response to the development of mathematics learning module based on ethnomathematics using inquiry method. This research method is Research and Development (R&D) using 4D model. Based on the results of the validation of stage 1 by the material experts obtained a cumulative average of 65.36% with the criteria of "good enough" which means that there is an improvement of some aspects contained in the module. After performing a series of revisions, the average score of cumulative of 84.02% validation with "good" criterion was obtained, so there is no revision of the module. The average score of cumulative validation of stage 1 by a media expert is 60% with a "good enough" code which means that it needs to be revised in some parts of the module. In the second stage of validation, the average cultivation is 86.66% with "very good" criteria so that the module is valid and ready for a field trial. From the results of research teacher response to the module obtained an average of 86.15% with the criteria "very interesting". In the small group trial, the average of 85% was obtained with interesting criteria and large group trial obtained an average of 87.28% with very interesting criteria so that the module is feasible and ready to be used as teaching materials.

Co-Authors Abi Fadila Agus Pahrudin Ahmad Fauzan Ahmad Sodiq, Ahmad Ali Murtadho Andika Eko Prasetiyo Andika Eko Prasetiyo, Andika Eko Anggraini, Rekasepti Ansely, Ghina Apriyani, Hikma Arfani Manda Tama Asri, Elsa Widya Bilqis, Ratu Ayu Budi Santoso Cantika, Fadiya Puteri Deden Makbuloh Delima Istiani Desi Vitona Dian Anggraini Dian Widi Astuti Dian Widi Astuti, Budi Irawan Prima Putra, Dian Widi Astuti, Diana Yonika Sari Dinda Permata Sari Dona Dinda Pratiwi Dwi Budi Santoso Dyah Arum Puspanaja Elfrida Ratnawati Fatimah, Okis Firmansyah, Mu'min Fitria Adelita Fredi Ganda Putra Gusti Ayu Farah Nabilla Hasan, Masykur Hery Susanto Hery Susanto Husnilawati Iip Sugiharta Ikhtiar Cahya Ajir Ikram Mawar Sari Ilham Fatoni Ima Damayanti Inka Mayelda Putri Kenny Candra Pradana Kiki Ambar Sari KOMARUDIN Laila Puspita Laila Puspita, Laila Lusi Anggraini M. Izzad Khairi Yazdi Maharani Fitriana Melinda, Selva Mu'min Firmansyah Muhamad Syazali Muhammad Akmansyah Muhammad Ilham Jaya Kesuma Mukhtar, Sajida Mutia Mutia Muzekki Nadila, Nadila Nanang Supriadi Novalia Novalia Novalia Novalia Novia Dwi Rahmawati Novian Riskiana Dewi Novitasari Supardi Nurhasanah Leni Nurjanah Nurjanah Nurrasiah, Nurrasiah Okis Fatimah Pranata, Meli Puput Nurmawati R. Suyanto Rahmawati, Yasinta Ramadhani Dewi Purwanti Ramadhani Dewi Purwanti, Ramadhani Dewi Rany Widyastuti Rany Widyastuti Ratu Ayu Bilqis Rekasepti Anggraini Reni Novilia Riska Fitriana Riyanto Adi Kusumah Riyanto Riyanto, Riyanto Adi Kusumah Rizka Pitri Rizki Wahyu Yunian Putra Roby Firdian Ruswanda Rosida Rakhmawati Safitri, Julia Dwi Sakti Aktarim Salih, Dana Taha Mohammed Sari, Dinda Permata Sekar Handayani Sihotang, Donald Harris Sintia Julia Siska Andriani Siti Mardiah Siti Mardiah, Siti Siti Patimah Siti Ulfa Nabila Suci M.Hum SH Hartati Suherman Suherman Suherman Suherman, Suherman Supardi, Novitasari Supriadi Supriadi Susianto, Yuni Syamsul Huda Syamsul Huda Syarifah Sri Rahayu Tama, Arfani Manda Tama, Arfani Manda Tatang Julianto Tri Nurhardina Ulfa Iqoh Wahyu Kusumaningtyas Wahyu Kusumaningtyas Wawan Gunawan Yasinta Rahmawati Yuberti Yuli Yanti Yulia Monica Yulina, Rikka Yulistia Devi Yulistiana Yulistiana Yuni Susianto

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